Search Publications
The chemical DNA of the Magellanic Clouds. I. The chemical composition of 206 Small Magellanic Cloud red giant stars
Lardo, C.; Bellazzini, M.; Mucciarelli, A. +4 more
We present the chemical composition of 206 red giant branch stars that are members of the Small Magellanic Cloud (SMC) using optical high-resolution spectra collected with the multi-object spectrograph FLAMES-GIRAFFE at the ESO Very Large Telescope. This sample includes stars in three fields that are located in different positions within the paren…
Massive galaxy formation caught in action at z ∼ 5 with JWST
Greve, Thomas R.; Brammer, Gabriel B.; Toft, Sune +13 more
We report the discovery of a compact group of galaxies, CGG-z5, at z ∼ 5.2 in the EGS field covered by the JWST/CEERS survey. CGG-z5 was selected as the highest overdensity of galaxies at z > 2 in recent JWST public surveys and it consists of six candidate members lying within a projected area of 1.5″ × 3″ (10×20 kpc2). All group mem…
The early evolution of young massive clusters. The kinematic history of NGC 6611/M16
Kaper, L.; de Koter, A.; Lamers, H. J. G. L. M. +3 more
Context. Young massive clusters provide the opportunity to study the outcome of the star formation process and the early evolution of star clusters. In the first few million years, the (massive) stars dynamically interact, producing runaways and affecting the initial (binary) population.
Aims: Observing and interpreting the dynamics of young …
Witnessing the fragmentation of a filament into prestellar cores in Orion B/NGC 2024
André, Ph.; Arzoumanian, D.; Könyves, V. +3 more
Context. Recent Herschel observations of nearby molecular clouds have shown that filamentary structures are ubiquitous and that most prestellar cores form in dense filaments. Probing the detailed density and velocity structure of molecular filaments is therefore crucial for improving our observational understanding of the star formation process. <…
ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H2O and OH lines
Menten, K. M.; Kervella, P.; Müller, H. S. P. +17 more
Context. Water (H2O) and the hydroxyl radical (OH) are major constituents of the envelope of O-rich late-type stars. Transitions involving energy levels that are rotationally or vibrationally highly excited (energies ≳4000 K) have been observed in both H2O and OH. These and more recently discovered transitions can now be obse…
Numerical studies on the link between radioisotopic signatures on Earth and the formation of the Local Bubble. II. Advanced modelling of interstellar 26Al, 53Mn, 60Fe, and 244Pu influxes as traces of past supernova activity in the solar neighbourhood
Schulreich, M. M.; Feige, J.; Breitschwerdt, D.
Context. Measurements of long-lived radioisotopes, which have grown rapidly in quantity and sensitivity over the last few years, provide a means, completely independent of other observational channels, to draw conclusions about near-Earth supernovae (SNe) and thus the origin of the Local Bubble (LB), our Galactic habitat. First and foremost in thi…
White dwarf spectral type-temperature distribution from Gaia DR3 and the Virtual Observatory
Solano, E.; Rebassa-Mansergas, A.; Raddi, R. +6 more
Context. The characterization of white dwarf atmospheres is crucial for accurately deriving stellar parameters such as effective temperature, mass, and age. However, the inclusion of physical processes such as convective mixing and convective dilution in current white dwarf atmospheric models offers a prediction of the spectral evolution of these …
Milky Way globular clusters on cosmological timescales. I. Evolution of the orbital parameters in time-varying potentials
Khoperskov, Sergey; Berczik, Peter; Ishchenko, Maryna +4 more
Context. Recent observational data show that the Milky Way galaxy contains about 170 globular clusters. A fraction of them is likely formed in dwarf galaxies that were accreted onto the Milky Way in the past, while the remaining clusters were formed in situ. Therefore, the different parameters, including the orbits, of the globular clusters are a …
Stellar variability in Gaia DR3. I. Three-band photometric dispersions for 145 million sources
Caballero, J. A.; Maíz Apellániz, J.; Holgado, G. +1 more
Context. The unparalleled characteristics of Gaia photometry in terms of calibration, stability, time span, dynamic range, full-sky coverage, and complementary information make it an excellent choice to study stellar variability.
Aims: We aim to measure the photometric dispersion in the G, GBP, and GRP bands of the 145 6…
A machine-learning-based tool for open cluster membership determination in Gaia DR3
Castro-Ginard, A.; Jordi, C.; Casamiquela, L. +2 more
Context. Membership studies characterising open clusters (OCs) with Gaia data - most of them using Gaia Data Release 2 (DR2) - have so far been limited at the faint end to magnitude G = 18 due to astrometric uncertainties.
Aims: Our goal is to extend current OC membership lists with faint members and to characterise the low-mass end. These lo…